chore: update tokio-console screenshots for v0.1.13

The screenshots on the docs.rs page for tokio-console are a bit out of
date. They are from v0.1.8 and still show the Target column instead of
the Kind column.

With the task size instrumentation and new lints which will be released
in the next version of Tokio Console, we need screenshots which match
what the user will see. The same goes for the screenshots in the
repository root README.md, which anyone visiting the repo page on GitHub
will see.

This change adds new screenshots for docs.rs and replaces the README
screenshots. We have to keep the docs.rs images from previous versions
still, since docs.rs pages for previous versions still reference them.

Additionally, a new CI job to build the docs.rs documentation and also
to check that all the images referenced from the tokio-console README
file (which is used on docs.rs) are present in the repository, as we
can't inspect the documentation until the change is merged.

.github/workflows/ci.yml

@@ -101,6 +101,40 @@ jobs:
       - name: Run cargo clippy
         run: cargo clippy --workspace --all-targets --no-deps -- -D warnings
 
+  docs:
+    name: Docs
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout sources
+        uses: actions/checkout@v4
+
+      - name: Install stable toolchain
+        uses: dtolnay/rust-toolchain@master
+        with:
+          toolchain: stable
+      - uses: Swatinem/rust-cache@v2
+
+      - name: Docs.rs
+        env:
+          RUSTDOCFLAGS: >
+            -D warnings
+            --force-warn rustdoc::redundant-explicit-links
+            --force-warn renamed-and-removed-lints
+            --cfg docsrs
+            --cfg tokio_unstable
+          RUSTFLAGS: --cfg tokio_unstable
+        run: cargo doc --no-deps --all-features
+
+        run: 
+      - name: Check tokio-console README images
+        run: >
+          for filename in
+            $(grep 'https://raw.githubusercontent.com/tokio-rs/console/main/assets' tokio-console/ README.md
+            | perl -n -e '/(tokio-console-[\d\.]+\/\w+\.png)/; print "$1\n"'
+          ); do
+            ls -l assets/$filename;
+          done
+
   grpc_web:
     name: gRPC-web Example
     runs-on: ubuntu-latest

tokio-console/README.md

@@ -121,7 +121,7 @@ tokio-console --lang en_US.UTF-8
 When the console CLI is launched, it displays a list of all [asynchronous tasks]
 in the program:
 
-![tasks list](https://raw.githubusercontent.com/tokio-rs/console/main/assets/tokio-console-0.1.8/tasks_list.png)
+![tasks list](https://raw.githubusercontent.com/tokio-rs/console/main/assets/tokio-console-0.1.13/tasks_list.png)
 
 Tasks are displayed in a table.
 
@@ -154,7 +154,7 @@ task.
 
 This view shows details about a specific task:
 
-![task details](https://raw.githubusercontent.com/tokio-rs/console/main/assets/tokio-console-0.1.8/task_details.png)
+![task details](https://raw.githubusercontent.com/tokio-rs/console/main/assets/tokio-console-0.1.13/task_details.png)
 
 The task details view includes percentiles and a visual histogram of the polling (busy) times
 and scheduled times.
@@ -166,7 +166,7 @@ Pressing the <kbd>escape</kbd> key returns to the task list.
 The <kbd>r</kbd> key switches from the list of tasks to a list of [resources],
 such as synchronization primitives, I/O resources, et cetera:
 
-![resource list](https://raw.githubusercontent.com/tokio-rs/console/main/assets/tokio-console-0.1.8/resources_list.png)
+![resource list](https://raw.githubusercontent.com/tokio-rs/console/main/assets/tokio-console-0.1.13/resources_list.png)
 
 Resources are displayed in a table similar to the task list.
 
@@ -192,13 +192,13 @@ while a resource is highlighted displays details about that resource.
 
 ### Resource Details
 
-![resource details --- sleep](https://raw.githubusercontent.com/tokio-rs/console/main/assets/tokio-console-0.1.8/resource_details_sleep.png)
+![resource details --- sleep](https://raw.githubusercontent.com/tokio-rs/console/main/assets/tokio-console-0.1.13/resource_details_sleep.png)
 
 The resource details view lists the tasks currently waiting on that resource.
 This may be a single task, as in the [`tokio::time::Sleep`] above, or
 a large number of tasks, such as this private `tokio::sync::batch_semaphore::Semaphore`:
 
-![resource details --- semaphore](https://raw.githubusercontent.com/tokio-rs/console/main/assets/tokio-console-0.1.8/resource_details_semaphore.png)
+![resource details --- semaphore](https://raw.githubusercontent.com/tokio-rs/console/main/assets/tokio-console-0.1.13/resource_details_semaphore.png)
 
 The resource details view includes a table of async ops belonging to the resource.